060
FNCA52 TJSJ 100730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST THU SEP 10 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-102000-
SOUTHEAST COASTAL PLAINS-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 20 20
TEMP (24H TREND) 89 (-2) 76 (-1) 91
RH % (24H TREND) 63 (+2) 95 (+4) 56
WIND 20FT/EARLY(MPH) E 17 E 13 E 17
WIND 20FT/LATE(MPH) E 18 E 12 E 18
MIXING HGT(FT-AGL/MSL)4880 5000
TRANSPORT WND (MPH) E 22 E 18
VENT RATE (KT-FT) 92720 80000
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-102000-
SOUTHERN HILLS-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 10
TEMP (24H TREND) 87 (0) 72 (-3) 89
RH % (24H TREND) 68 (+3) 99 (+4) 61
WIND 20FT/EARLY(MPH) E 14 E 13 E 13
WIND 20FT/LATE(MPH) E 14 E 13 E 13
MIXING HGT(FT-AGL/MSL)5660 5630
TRANSPORT WND (MPH) E 22 E 17
VENT RATE (KT-FT) 107540 84450
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-102000-
NORTH COASTAL PLAINS-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 20 30
TEMP (24H TREND) 91 (0) 76 (-2) 91
RH % (24H TREND) 65 (-1) 99 (+3) 61
WIND 20FT/EARLY(MPH) E 16 E 17 E 14
WIND 20FT/LATE(MPH) E 19 E 12 E 19
MIXING HGT(FT-AGL/MSL)5250 5170
TRANSPORT WND (MPH) E 21 E 17
VENT RATE (KT-FT) 94500 77550
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-102000-
NORTHERN HILLS-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 0 20
TEMP (24H TREND) 89 (-1) 73 (-2) 90
RH % (24H TREND) 67 (+2) 99 (+1) 62
WIND 20FT/EARLY(MPH) E 13 E 14 E 12
WIND 20FT/LATE(MPH) E 17 E 9 E 17
MIXING HGT(FT-AGL/MSL)6600 6250
TRANSPORT WND (MPH) E 20 E 15
VENT RATE (KT-FT) 112200 81250
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-102000-
WEST COAST-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS NONE SHOWERS
CHANCE PRECIP (%) 50 0 40
TEMP (24H TREND) 91 (-1) 75 (-1) 92
RH % (24H TREND) 66 (-1) 98 (+2) 61
WIND 20FT/EARLY(MPH) E 16 E 16 E 14
WIND 20FT/LATE(MPH) E 17 E 11 E 14
MIXING HGT(FT-AGL/MSL)5270 4640
TRANSPORT WND (MPH) E 18 E 12
VENT RATE (KT-FT) 84320 46400
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-102000-
EASTERN INTERIOR-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 30 30
TEMP (24H TREND) 88 (-1) 74 (-2) 89
RH % (24H TREND) 69 (+5) 100 (+4) 62
WIND 20FT/EARLY(MPH) E 16 E 16 E 14
WIND 20FT/LATE(MPH) E 14 E 14 E 13
MIXING HGT(FT-AGL/MSL)5640 5780
TRANSPORT WND (MPH) SE 21 E 16
VENT RATE (KT-FT) 101520 80920
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-102000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 40 30
TEMP (24H TREND) 84 (+1) 71 (-3) 84
RH % (24H TREND) 76 (+3) 100 (+1) 68
WIND 20FT/EARLY(MPH) E 13 E 12 E 13
WIND 20FT/LATE(MPH) SE 13 E 12 E 12
MIXING HGT(FT-AGL/MSL)4100 4490
TRANSPORT WND (MPH) E 22 E 17
VENT RATE (KT-FT) 77900 67350
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-102000-
CENTRAL MOUNTAIN RANGE-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 0 30
TEMP (24H TREND) 86 (+2) 70 (-3) 87
RH % (24H TREND) 70 (0) 99 (+2) 63
WIND 20FT/EARLY(MPH) E 12 E 10 E 10
WIND 20FT/LATE(MPH) SE 12 E 8 E 11
MIXING HGT(FT-AGL/MSL)6820 7340
TRANSPORT WND (MPH) SE 20 E 13
VENT RATE (KT-FT) 115940 80740
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-102000-
CAYEY MOUNTAIN RANGE-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 40 30
TEMP (24H TREND) 83 (-1) 72 (-1) 84
RH % (24H TREND) 77 (+7) 100 (+1) 69
WIND 20FT/EARLY(MPH) E 12 E 11 E 12
WIND 20FT/LATE(MPH) E 12 E 11 E 12
MIXING HGT(FT-AGL/MSL)4580 4950
TRANSPORT WND (MPH) E 22 E 18
VENT RATE (KT-FT) 87020 79200
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-102000-
VIEQUES-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 40 30
TEMP (24H TREND) 89 (-1) 79 (-1) 89
RH % (24H TREND) 65 (+3) 88 (0) 60
WIND 20FT/EARLY(MPH) E 19 E 19 E 17
WIND 20FT/LATE(MPH) E 17 E 18 E 16
MIXING HGT(FT-AGL/MSL)3110 3930
TRANSPORT WND (MPH) E 25 E 18
VENT RATE (KT-FT) 68420 62880
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-102000-
CULEBRA-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 30
TEMP (24H TREND) 90 (0) 80 (-1) 90
RH % (24H TREND) 66 (-1) 89 (0) 62
WIND 20FT/EARLY(MPH) E 19 E 19 E 17
WIND 20FT/LATE(MPH) E 17 E 18 E 16
MIXING HGT(FT-AGL/MSL)3020 4150
TRANSPORT WND (MPH) E 25 E 18
VENT RATE (KT-FT) 66440 66400
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-102000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 10
TEMP (24H TREND) 92 (+1) 76 (-2) 93
RH % (24H TREND) 60 (-1) 95 (+6) 56
WIND 20FT/EARLY(MPH) E 21 E 20 E 19
WIND 20FT/LATE(MPH) E 21 E 17 SE 21
MIXING HGT(FT-AGL/MSL)5250 5090
TRANSPORT WND (MPH) E 25 E 20
VENT RATE (KT-FT) 115500 86530
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-102000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 10
TEMP (24H TREND) 89 (+1) 79 (-2) 89
RH % (24H TREND) 64 (-5) 90 (-1) 60
WIND 20FT/EARLY(MPH) E 19 E 18 E 18
WIND 20FT/LATE(MPH) E 17 E 17 E 16
MIXING HGT(FT-AGL/MSL)2750 3810
TRANSPORT WND (MPH) E 25 E 18
VENT RATE (KT-FT) 60500 60960
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-102000-
ST CROIX-
330 AM AST THU SEP 10 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 10
TEMP (24H TREND) 90 (+1) 79 (-1) 91
RH % (24H TREND) 66 (-3) 92 (-1) 61
WIND 20FT/EARLY(MPH) E 18 E 18 E 18
WIND 20FT/LATE(MPH) E 17 E 18 E 16
MIXING HGT(FT-AGL/MSL)4500 4510
TRANSPORT WND (MPH) E 23 E 22
VENT RATE (KT-FT) 90000 85690
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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